Smooth line-only pen drawing in Inkscape - Graphic Design Stack

Using pen and paper I drew a castle (monochrome, only lines, no fillings, no gradients, no pen pressure differences), then scanned it and vectorized it with Trace Bitmap in Inkscape: I want to red

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Does anyone know how to execute a pattern like this on illustrator? I've tried a few ways but nothing I do will make it smooth like this it's either wavy or straight

Always auto smooth, or smooth more objects at once - InkscapeForum.com

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